BPSC 4.0 BIHAR MIDDLE SCHOOL TEACHERS (FOR CLASS 6-8) MATH & SCIENCE MOVE ON STUDY
Solid state types of solid crystalline solid amorphous solid ionic solid covalent solid molecular solid metallic solid unit cell primitive unit cell centre unit cell body centred unit cell face centred unit cell in central universities centre unit cell types of crystal system orthogonal cubic tetragonal rhombohedral hexagonal hexagonal monoclinic dry cleaning